Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755261AbcK1UHw (ORCPT ); Mon, 28 Nov 2016 15:07:52 -0500 Received: from p3plsmtps2ded02.prod.phx3.secureserver.net ([208.109.80.59]:52510 "EHLO p3plsmtps2ded02.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754976AbcK1T4o (ORCPT ); Mon, 28 Nov 2016 14:56:44 -0500 x-originating-ip: 72.167.245.219 From: Matthew Wilcox To: linux-kernel@vger.kernel.org, Andrew Morton , Konstantin Khlebnikov , Ross Zwisler Cc: Matthew Wilcox , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Kirill A . Shutemov" Subject: [PATCH v3 12/33] tools: Add more bitmap functions Date: Mon, 28 Nov 2016 13:50:50 -0800 Message-Id: <1480369871-5271-47-git-send-email-mawilcox@linuxonhyperv.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1480369871-5271-1-git-send-email-mawilcox@linuxonhyperv.com> References: <1480369871-5271-1-git-send-email-mawilcox@linuxonhyperv.com> X-CMAE-Envelope: MS4wfEPIPgdpaMk+7QtiVYs958MhPLzdk5g5DBPz5ldnhDJLByU08okGG1+6880unHSUoeP2iocuDGM+V9od1Jlkr+SdUuaGwd6G4fPpmSTLYNo9cXmLR5rM UQSXRcojYWpDfJ7YmgwSKEw0xEuCo5mx/Qylmj2MeOlmCicaucerDOWuGZSwz4L5K5zzJ1lIwPVuGBddnTutgBR/lPbto7I6IlWtkqMx4hzKXyFaSBU+croC GPF14/IIZw1TMx2m7wycPnTc7em4V08PrdOD77T0reB8LDfQ/IyfKPMO/lFBIdh8+H40YSeLrA96wfrrA6ku5Bd6WRn6nCglqmhKIqNWVSn9nZs7A28eL5bg VnZxaKQZ459ZXar2YkgID4az9M/CeggncTDywwsMvIXh7s0Dj59srw7LEUJNcggg7woUCLYub6tCjGpzTfD4j4tWV+e88OfowiFdfU8tdUKbR7pz1qo= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1409 Lines: 52 From: Matthew Wilcox I need the following functions for the radix tree: bitmap_fill bitmap_empty bitmap_full Copy the implementations from include/linux/bitmap.h --- tools/include/linux/bitmap.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h index 43c1c50..eef41d5 100644 --- a/tools/include/linux/bitmap.h +++ b/tools/include/linux/bitmap.h @@ -35,6 +35,32 @@ static inline void bitmap_zero(unsigned long *dst, int nbits) } } +static inline void bitmap_fill(unsigned long *dst, unsigned int nbits) +{ + unsigned int nlongs = BITS_TO_LONGS(nbits); + if (!small_const_nbits(nbits)) { + unsigned int len = (nlongs - 1) * sizeof(unsigned long); + memset(dst, 0xff, len); + } + dst[nlongs - 1] = BITMAP_LAST_WORD_MASK(nbits); +} + +static inline int bitmap_empty(const unsigned long *src, unsigned nbits) +{ + if (small_const_nbits(nbits)) + return ! (*src & BITMAP_LAST_WORD_MASK(nbits)); + + return find_first_bit(src, nbits) == nbits; +} + +static inline int bitmap_full(const unsigned long *src, unsigned int nbits) +{ + if (small_const_nbits(nbits)) + return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits)); + + return find_first_zero_bit(src, nbits) == nbits; +} + static inline int bitmap_weight(const unsigned long *src, int nbits) { if (small_const_nbits(nbits)) -- 2.10.2